Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक Disclosure to Promote the Right To nformation Whereas the Parliament of ndia has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of ndian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to nformation, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New S (1985): Piezoelectric Ceramic Materials, Part 3: Types 4 and 8 [LTD 5: Semiconductor and Other Electronic Components and Devices]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda nvent a New ndia Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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4 UDC S: 014(Part3)-1985 El 1 ndian Standard SPECFCATON FOR PEZOELECTRC CERAMC MATERALS PART 3 TYPES 4 AND 8 2. General -This standard ( Part 3 ) shall be read in conjunction with S : ( Part 1 )-984 Specification for piezoelectric ceramic materials : Part 1 General aspects and methods of measurenents.. Type Designation - See 3 of S : ( Part 1 ) Type 4 - Modified lead zirconate titanate material having low loss factor ( tan 2 ) and highmechanical quality factor ( Qm ) along with other normal piezoelectric properties suitable for use in high signal applications. 1.2 Type8- Modified lead zirconate titanate material having lower dielectric loss factor ( tan B ) ag Jvell as lower mechanical loss factor ( high 0, ) compared to Type 4 and it has greater resistance tc jepolarization which makes it suitable for very high signal applications. i. iesi Specimens - ^,, ye,,ard ^^.^ -.,..r:..., ~ral\llxll,~s,,j.-l:.%.rr..,.:rrw.r,.,.a >c;u :... L,,Fi,Q,,,,ti,.,...,m:.-. VilllllG,l,J +.,fimfi..*,. _,,,,rry #,,,l L., U b,la,t ^..:r_l,. for the measurement of many piezoelectric parameters. To determine these parameters accurately, the specimen should have size A, B or C depending upon the parameter to be measured, as given ir Table 1. ~~ TABLE 1 SPECMEN SZE REQURED FOR MEASUREMENT OF PEZOELECTRC PARAMETERS Parameter to be Size of the Measured Specimen* T K3 A, B or C K, C d3s A g3?. A Nat B or C Q??l A, 6 or C *Size A : / > 2 5 W, t or D where both ends are electroded. Size B : > 3 5 W, f where major faces are electroded. Size C : t where the surfaces are electroded. where -length, W-Width, t-thickness, and D=Diameter. ~~_._. ~ ~~~ Adopted 25 October 1985 Q September S Gr 4 NDAN STANDARDS NSTTUTON MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELH

5 S : 1014 (Part 3) Parameters - See Table 2 below : TABLE 2 PARAMETERS WTH TOLERANCE FOR PEZOELECTRC CERAMC MATERALS TYPES 4 AND 8 Constant Symbols a) Density ( Min ) ( O kglmetres ) d b) Dielectric constant K3 *c) Dissipation factor tan8 d) Resistiviiy ( ohm.cm ) at 25 C P e) Planner coupling coefficient ho 1) Piezoelectric charge constant &a XO- B C/N g? Piezoelectrlc voltage constant 933 X10- V-m/N h) Frequency constant (meter -- Hz) N1* j) Mechanical quality factor Qm k) Curie temperature ( C ) ( Min ) 90 Piezoelectric Material r A ~ Type 4 Type 6 Tolerance *20 percent QO.004 QO * 5 percent * 10 percent *O percent * 10 percent * 10 percent This is low signal voltage value measured at 1 khz. Printed at DellTPrinters, New Delhi, ndia